# Acceleration where velocity is changing

1. Feb 8, 2006

### tandoorichicken

How would one describe the acceleration (linear and angular) if the velocity is constant but direction is constantly changing, i.e., circular motion?

2. Feb 8, 2006

### Fermat

If the velocity (circumferential speed) is constant and motion is in a circle, then the acceleration is called centripetal acceleration.
Since the velocity is constant, then there is no linear (i.e. tangential) acceleration, or angular acceleration.

3. Feb 8, 2006

### tandoorichicken

Thanks fermat, so this means that both angular acceleration and the tangential acceleration = 0?

4. Feb 8, 2006

### Fermat

If the peripheral velocity is constant,then that's right, yes.